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CVE-2021-47943

Estado: AplazadaAlta (8.7)—

TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N+PR:L indica acceso remoto autenticado (T1210). Upload de PHP shell → web shell (T1505.003). GET + system() permite ejecución de comandos (T1059).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Disable or Remove Feature or ProgramPrivileged Account ManagementVulnerability ScanningUser Account ManagementThreat Intelligence ProgramRestrict Web-Based Content

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Textpattern — CMSAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-47943",
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        "ssvcData": {
          "id": "CVE-2021-47943",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
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      }
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    "cvssMetricV40": [
      {
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        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "product": "TextPattern CMS",
          "versions": [
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  "published": "2026-05-10T13:16:30.627",
  "references": [
    {
      "url": "https://www.exploit-db.com/exploits/49996",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://www.exploit-db.com/exploits/50415",
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "description": [
        {
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          "value": "CWE-434"
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    {
      "lang": "en",
      "value": "TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function."
    },
    {
      "lang": "es",
      "value": "TextPattern CMS 4.8.7 contiene una vulnerabilidad de ejecución remota de código que permite a atacantes autenticados ejecutar comandos arbitrarios mediante la carga de archivos PHP maliciosos a través de la funcionalidad de carga de archivos. Los atacantes pueden cargar un shell PHP a través de la sección Archivos en el área de contenido y ejecutar comandos accediendo al archivo cargado en /textpattern/files/ con parámetros GET pasados a la función del sistema."
    }
  ],
  "lastModified": "2026-07-25T10:10:00.167",
  "sourceIdentifier": "disclosure@vulncheck.com"
}